CN103843227A - Ups mechanical transfer relay arc mitigation - Google Patents
Ups mechanical transfer relay arc mitigation Download PDFInfo
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- CN103843227A CN103843227A CN201280048380.5A CN201280048380A CN103843227A CN 103843227 A CN103843227 A CN 103843227A CN 201280048380 A CN201280048380 A CN 201280048380A CN 103843227 A CN103843227 A CN 103843227A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/13—Modifications for switching at zero crossing
Abstract
Systems and methods of providing power with an uninterruptible power supply are provided. The uninterruptible power supply includes a first input to receive an input AC voltage from a power source, the input AC voltage having an associated phase angle, and a second input to receive an input voltage from a backup power source. The uninterruptible power supply also includes an output. The output provides output power derived from power from at least one of the power source and the backup power source. The uninterruptible power supply also includes an inverter coupled to the backup power source, a relay and a controller. The relay is configured to couple the first input with the output in a first position, and to couple the inverter with the output in a second position. The controller is configured to detect a voltage swell condition of the input voltage, and responsive to detection of the voltage swell condition, control the relay to switch from the first position to the second position during a predefined range of phase angles of the input AC voltage.
Description
Background
1. technical field
In the present invention, have at least an execution mode to relate generally to the system and method that uninterrupted power supply device is provided, more particularly, the present invention relates to control uninterrupted power supply device.
2. background technology
Uninterrupted power supply device (UPS) is for providing reliable electric power to the electronic equipment of number of different types.The adjustable confession of uninterrupted power supply device is to the electric power of load, and can the in the situation that of main power loss, provide non-firm power to arrive load, for example, while power failure or subtract under electric state.Unexpected fluctuation in input electric power is provided in uninterrupted power supply device can waste energy and damage electric equipment, and this causes cost to increase, cap loss, and may need electronic component needed for repair and replacement.
Summary of the invention
Each side involved in the present invention and execution mode are mainly for using uninterrupted power supply device that the system and method for uninterrupted electric power is provided.Uninterrupted power supply device receives electric power and provides electric power at output at input end.Uninterrupted power supply device also comprises inverter and relay, and this relay is configured to optionally in a configuration, input and output are coupled, and in another configuration, inverter and output is coupled.Uninterrupted power supply device also comprises controller, and this controller can detect voltage swells (voltage swell) state, as the increase of the input voltage receiving at uninterrupted power supply device input end.Based on voltage swells state, the switching of controller regulating relay to be to prevent inverter reverse feeding, and provides electric power at uninterrupted power supply device output.
Have at least on the one hand for uninterrupted power supply device.Uninterrupted power supply device comprises first input end, and this first input end is configured to receive the input AC voltage from power supply, and this input AC voltage has the phase angle being associated.The second input is configured to receive from the input voltage of stand-by power supply, and output is configured to provide at least one the output power of electric power being obtained from from power supply and stand-by power supply.Uninterrupted power supply device also comprises inverter and relay, and this inverter is coupled to stand-by power supply, and this relay is configured to inverter and output are coupled by the coupling of first input end and output and in the second place in primary importance.Uninterrupted power supply device also comprises controller, and this controller is configured to detect the voltage swells state of input voltage.In response to voltage swells state being detected, controller control relay switches to the second place from primary importance in the scope at the predetermined phase angle of input AC voltage.
In some embodiments, in response to voltage swells state being detected, in the predetermined amount of time of controller control relay before input voltage zero crossing, be switched to the second place from primary importance.Controller can control relay between before input voltage zero crossing 6.3 milliseconds and 3.1 milliseconds, is switched to the second place from primary importance.
In one embodiment, first input end comprises input line and the neutral line, in order to receive the input AC voltage from power supply.Relay, and is coupled input line and the neutral line in the second place input line and the neutral line and output coupling in primary importance with inverter.In some embodiments, inverter comprises DC bus line, and the switching of controller control relay, to keep the substantially invariable voltage of DC bus line during voltage swells state.Controller is sampled to input AC voltage, and input AC voltage and the reference voltage of sampling are compared, to detect voltage swells state.In one embodiment, controller is sampled and is determined the input AC magnitude of voltage of multiple samplings input AC voltage, and based on having at least two to detect voltage swells state higher than reference voltage in one group four continuous sampling input AC magnitudes of voltage.
At least also have another aspect to there is for a kind of use the method that the uninterrupted power supply device of input, output, inverter and relay distributes uninterrupted electric power.Relay is coupled input and output inverter and output are coupled in the second place in primary importance.The method comprises: receive from the behavior of input voltage of power supply and the behavior of the voltage swells state of detection input voltage.In response to the detection of voltage swells state, the method comprises: the behavior of phase angle handover operation between primary importance and the second place with starting relay of identification input voltage.The method also comprises: at the described phase angle place of input voltage, relay is switched to the behavior of the second place from primary importance.
In some embodiments, described method comprises and postpones relay to be switched to the second place until the behavior of the predetermined amount of time input voltage zero crossing from primary importance in response to voltage swells state being detected, and within a predetermined period of time relay switched to the behavior of the second place from primary importance.In one embodiment, inverter comprises DC bus line, and the switching of the method control relay between the first and second positions, to keep the substantially invariable voltage of DC bus line during voltage swells state.In some embodiments, the method comprises input voltage is sampled and the input voltage of sampling and reference voltage compared to detect the behavior of voltage swells state.In one embodiment, the method comprises following behavior: input voltage is sampled to determine to the input voltage value of multiple samplings, and have at least two to detect voltage swells state higher than reference voltage in input voltage value based on one group of four continuous sampling.The method also comprises following behavior: within the time period detecting between voltage swells state and input voltage zero crossing, relay is switched to the second place from primary importance.
At least also have on the other hand for a kind of uninterrupted power supply device, this uninterrupted power supply device comprises first input end, and it is configured to receive the input AC voltage from power supply, and this input AC voltage has the phase angle being associated.The second input is configured to receive the input voltage from stand-by power supply.Output is configured to provide at least one the output power of electric power being obtained from from power supply and stand-by power supply.Described uninterrupted power supply device also comprises inverter and relay, and this inverter and stand-by power supply are coupled, and this relay is configured in primary importance, first input end and output are coupled, and in the second place, inverter and output is coupled.Described uninterrupted power supply device comprises detection and control device, this device is for detection of the voltage swells state of input voltage, and in response to voltage swells state being detected, in the scope at predetermined phase angle of inputting AC voltage, control relay is switched to the second place from primary importance.
In some embodiments, described uninterrupted power supply device comprises control device, and this device is switched to the second place in the predetermined amount of time of control relay before input voltage zero crossing from primary importance.Described uninterrupted power supply device can also comprise sampling and comparison means, and this device is for sampling to input AC voltage and the input AC voltage of this sampling and reference voltage being compared to detect voltage swells state.In one embodiment, first input end comprises input line and the neutral line, in order to receive the input AC voltage from power supply.Relay is in primary importance by input line and the neutral line and output coupling, and relay is coupled input line and the neutral line in the second place with inverter.In one embodiment, the device switching for control relay comprises the device for conversion command is provided, and this order indicating relay is switched to the second place from primary importance.
Above-mentioned and other aspect and execution mode will discuss in detail below.Above-mentioned information and detailed description below comprise the illustrative example of various aspects and execution mode, and provide summary or framework to understand character and the feature of various aspects required for protection and execution mode.Accompanying drawing provides the explanation of various aspects and execution mode and further understands, and is incorporated to this specification and forms the part of this specification.Accompanying drawing is used for describing and explaining each side required for protection and execution mode together with the remainder of specification.
Accompanying drawing explanation
Accompanying drawing is not intended to draw in proportion.In the accompanying drawings, the each identical or almost identical parts shown in each figure represent with similar label.For clarity sake, be not that each parts are labeled in every width accompanying drawing.In the accompanying drawings:
Fig. 1 is the schematic block diagram of describing uninterrupted power supply device according to execution mode;
Fig. 2 describes the diagram corresponding to the uninterrupted power supply device feature of voltage swells state according to execution mode;
Fig. 3 is the flow chart of describing a kind of method that uninterrupted power supply device is provided according to execution mode.
Embodiment
The system and method that the present invention describes is not limited to that this specification proposes or CONSTRUCTED SPECIFICATION shown in the drawings and arrangement of components in application.The present invention can be applicable to other execution mode and can put into practice in every way or implement.And wording used herein and term are for purpose of explanation, and should not be counted as restriction." comprising " in the present invention, " by ... composition ", " having ", " comprising ", " relating to " " with ... be feature ", " it is characterized in that " and refer to and comprise project, its equivalent and other project listed thereafter at various variants herein, and comprise the embodiment of projects of listing specially thereafter.
Fig. 1 has described uninterrupted power supply device (UPS) 100.In one embodiment, although may be for the power supply of other type in other execution mode, as real-time operation, for subsequent use or two conversion uninterrupted power supply device, uninterrupted power supply device 100 be Line interaction uninterrupted power supply devices.Uninterrupted power supply device 100 comprises such as main line of input 105(), this end is in order to receive the electric power from power supply 110.For example, input line 115 and the neutral line 120 can receive the AC electric power from power supply 110.In one embodiment, input line 115 and the neutral line 120 are main lines of uninterrupted power supply device 100, and it is configured to receive the AC electric power from electrical network.
Uninterrupted power supply device 100 also comprises two relays 125.In one configuration, relay 125 is connected input 105 with output 130.For example, relay 125 can be the switch with Mechanical Contact, in order to input line 115 or the neutral line 120 are coupled with output 130, to provide electric power at output 130 places.
Uninterrupted power supply device 100 also comprises inverter 140.In another kind configuration, relay 125 is coupled inverter 140 and output 130, to provide electric power at output 130 places.Electric power at output 130 places can be provided to load 135.In one embodiment, stand-by power supply 155 can provide non-firm power to inverter 140 via DC bus line 150.
Uninterrupted power supply device 100 also comprises controller 145.In one embodiment, the operation of controller control uninterrupted power supply device 100, comprises the switching of relay 125.For example, controller 145 can switch back and forth by control relay 125 between primary importance and the second place, wherein, in primary importance, relay 125 is by input circuit 105 and output circuit 130 electrical couplings, in the second place, relay 125 is by inverter 140 and output circuit 130 electrical couplings, with operational mode operation for subsequent use.In one embodiment, controller 145 control relays 125 switch simultaneously.Fig. 1 has described relay 125 and in primary importance, input 105 and output 130 has been coupled.Controller 145 can be switched to the second place from this position by relay 125, and it is coupled inverter 140 and output 130.When input AC electric power is while being acceptable (as determined by controller 145), uninterrupted power supply device 100 is turned round by input electric power.Exceed the situation of allowed band when controller 145 detects input electric power, controller 145 control relays 125 are coupled to inverter 140, and uninterrupted power supply device 100 is moved under standby operation mode.The situation that exceeds allowed band at least comprises input electric power loss, input electric power voltage is low and input electric power voltage is high.
In the running of uninterrupted power supply device 100, the voltage swells at input 105 places can be at input 105(for example, input line 115 or the neutral line 120) and inverter 140 between produce electric arc.Electric arc appears at least one relay 125, and produces low impedance path between input line 105 and inverter 140.Although may go up in the position shown in the figure 1 at relay 125, arc discharge (arcing) occurs, when relay 125 is in the time switching from position shown in Fig. 1, arc discharge more easily occurs and causes damage.This may cause that electric current reverse feeding is to inverter 140.For example, the contact of relay 125 can be transported to inverter 140 by electric arc from input line 115 or the neutral line 120 in handoff procedure.Semiconductor or other parts that this can make inverter DC bus line voltage be increased to overload and damage inverter 140.
In one embodiment, relay 125 is single-pole double throw switching relaies, and it is easily often opening arc discharge between the utmost point 127 and the normally closed utmost point 129.For example, relay 125 can be in the first band electric position operation, and it is coupled input 105 and output 130, and relay 125 also can be in uncharged second place operation, and it is coupled inverter 140 and output 130.In addition, two relays 125 can be independent relay, can be also two switching parts of a relay, and it is controlled by controller 145.
In one embodiment, controller 145 detects voltage swells state.For example, controller 145 can comprise processor (for example, microprocessor) and differential amplifier circuit.Input voltage current potential between differential amplifier circuit perception input line 115 and the neutral line 120, and this line voltage distribution is adjusted in proportion and is suitable for the level that processor is measured.Controller 145 compares measured voltage sample and reference voltage.In one embodiment, the nominal input voltage of uninterrupted power supply device 100 is that 120V and reference voltage are 160V, determines that higher than reference voltage voltage swells state exists.Other reference voltage level, as 143V, 155V, 165V or 208V can be used in various execution modes.Reference voltage can be a part for reference voltage curve waveform, and this curve waveform is stored in the memory relevant to controller 145.
In one embodiment, controller 145 carries out repeated sampling to input voltage.For example, controller 145 can be sampled to input voltage for 64 times evenly distributedly with every line voltage cycle, to detect or other any situation that exceeds allowed band, above-mentioned situation causes the switching of relay 125 and uninterrupted power supply device 100 is turned round under standby operation mode.In this example, voltage swells state can start at any one the some place in the on-Line Voltage cycle.For the differential voltage between voltage and reference voltage being adjusted in proportion less (for example, approach zero crossing and the reference voltage of circuit) time prevent during the part in the on-Line Voltage cycle that the less line voltage distribution of perception rises sharply mistakenly, the perception that rises sharply of line voltage distribution in this example is limited in, between the 4th and the 28th sample, being then limited between the 36th and the 60th sample.Controller 145 can be by assessing the voltage swells state during one or more voltage in these sampling times detects any one in these two cycles.
In one embodiment, controller 145 compares with reference to one group of four voltage in voltage and 4 sampling times.This sample group can be the continuous or discontinuous sample of input voltage waveform line voltage cycle.Described controller 145 can be determined and in the time that the multiple line voltage distribution samples in the line voltage distribution sample of this group through surveying exceed reference voltage, has voltage swells state.For example, when any two while exceeding reference voltage in four of this group line voltage distribution samples through measuring, controller 145 can detect voltage swells state.Rise sharply two samples of state of instructed voltage can be continuous but must not be continuous.
In one embodiment, in the time that voltage swells causes exceeding the situation of allowed band, controller 145 will be in the time that input voltage waveform approaches zero crossing the switching of starting relay 125, to reduce the possibility of arc discharge on relay 125.Can occur twice owing to spending zero passage in line voltage cycle at input voltage 360, only at zero passage place or approach the control that zero passage place control relay 125 and inverter 140 couplings can be slowed down to inverter 140.This may not be suitable for some application that needs quick control inverter 140, such as voltage dip, under-voltage or power breakdown.Therefore, in one embodiment, controller 145 can detect voltage swells state, and in response to voltage swells state being detected, controller 145 control relays 125 postpone to switch, until input voltage approaches zero crossing.In the situation that not there is not voltage swells state, controller 145 can move relay 125 and not carry out this delay.In one embodiment, in response to the delay of detected voltage swells state close to the half period of input voltage or still less.Controller 145 can determine that voltage swells state finishes also again control relay 125 and not free the delay.
Voltage swell can be caused by many reasons, comprises due to another the phase place earth fault going up mutually at input voltage.For example, in the time that uninterrupted power supply device 100 moves in the three-phase system of Δ ground connection, phase place earth fault may cause being approximately higher than greatly the voltage swells of nominal 73%.In Y type grounding system, fault can cause input voltage to be approximately higher than greatly nominal 35%.At least in some embodiments, controller 145 will detect each in these situations and is designated voltage swells.
In response to detected voltage swells state, controller 145 can be identified the phase angle of input voltage or the time corresponding with the zero crossing of input voltage, thereby provides conversion command with transfer relay 125.For example, corresponding to the voltage swells state detecting, controller 145 can postpone conversion command, until more approach the degree of 79 in input voltage waveform point or 259 degree points.In this embodiment, when input voltage approaches zero crossing, and after approximately 3 milliseconds of conversion commands, relay 125 starts to open.In this example, after application conversion command general 4.5 milliseconds, relay 125 and inverter 140 be coupled (for example, closure).
In one embodiment, controller 145 can provide conversion command with transfer relay 125 in the arbitrfary point within the time period of measuring with respect to input voltage zero crossing.The delay moving in response to the relay 125 of the order for switching is considered, to determine the timing boundary of this time period.For example, controller 145 can provide conversion command in 0.76 millisecond that detects after voltage swells.Relay 125 is providing after conversion command 3.1 milliseconds to start to open, or is detecting that after voltage swells state, 3.86 milliseconds start to open.(3.1+.76=3.86 millisecond.) relay can carry out switching position with 1.36 milliseconds.In this example, relay 125 after controller 145 detects voltage swells 5.22 milliseconds complete handover operation.(0.76+3.1+1.36=5.22 millisecond).This equals controller 145 provides after conversion command 4.46 milliseconds.(3.1+1.36=4.46 millisecond).
In an execution mode with above-mentioned delay, controller 145 stops in before input voltage zero crossing 3.1 milliseconds of relay 125 (for example, the time of delay of relay 125) to start to switch.This is with respect to the first border of the time period of zero crossing or the example of inner boundary.Consider the time of delay of relay 125, this border has been guaranteed relay 125 at zero crossing place or has been started to switch early than zero crossing place, to avoid exceeding at inverter 140 places the situation of allowed band.For example, uninterrupted power supply device 100 can be worked under the nominal input voltage of 120V, and controller 145 can detect 208V voltage swells at 290 degree phase angle places.In this example, controller 145 was no more than 3.1 milliseconds conversion command is provided before input voltage zero crossing.
In one embodiment, controller 145 prevents that relay 125 from starting and switching more than 6.3 milliseconds before input voltage zero crossing.This is with respect to the second boundary of the time period of zero crossing or the example of external boundary.For example, uninterrupted power supply device 100 can be worked under the nominal input voltage of 120V, and controller can detect 220V voltage swells at 220 degree phase angle places.In this example, controller 145 before input voltage zero crossing no more than 6.3 milliseconds conversion command is provided.Control relay 125 changes in external boundary inscribe the interior situation that occurs exceeding allowed band of inverter 140 of having avoided, because, for example, relay 125 has completed their handover operation, thereby and input voltage causes arc discharge on relay 125 close to zero crossing very much.
Therefore, in one embodiment, with respect to the time period of the input voltage zero crossing that may switch be between 6.3 milliseconds and 3.1 milliseconds before zero crossing.This timing window is applicable to any one half period of input voltage.These numerical value and scope be sample and be approximation, and the parts of (for example, +/-10%) and uninterrupted power supply device 100 can have other delay, switching and total Latency response time, and these numerical value can be higher than also can be lower than these samples.For example, under different operation conditionss, controller 145 can be before zero crossing more than 6.3 milliseconds or can be less than 3.1 milliseconds before zero crossing conversion command is provided, for example use higher or lower than 1000W linearity or nonlinear resistance load, or line frequency is 50Hz or 60Hz.
Fig. 2 is the figure that has described the element waveform of uninterrupted power supply device 100 in running.According to Fig. 2, uninterrupted power supply device 100 moves in the situation that nominal input voltage is 120V, and 200V voltage swells state occurs in 220 degree places in input voltage waveform.In this example, the operating frequency of uninterrupted power supply device 100 is 50Hz, and uninterrupted power supply device 100 moves the in the situation that of 1000W resistive load.
In the example of Fig. 2, controller 145 is spent phase angle place at approximately 238 of input voltage waveform 210 provides conversion command 205.From sending the delay of about 3 milliseconds of conversion command 205, their conversion is opened and started to relay 125, representing as switch opens axis 215.Although (Fig. 2 does not directly describe, when in this example, above-mentioned situation occurs in 3.64 milliseconds before zero crossing.) relay 125 while opening electric arc occur, represented as being reduced by voltage in 220 sections of UPS output voltage waveforms 225.Relay 125 completes axle place in switching and completes conversion 230.Although (Fig. 2 does not directly describe, when in this example, above-mentioned situation occurs in early than 2.3 milliseconds of zero crossings.) now, relay 125 cuts out at its second place place, and electric arc disappears at axle 235 places.
At the time instant corresponding to axle 235, weaken and stablized by the input current shown in input current waveform 240 by the voltage dip shown in section 220.In the time that input voltage waveform 210 approaches zero crossing, electric arc disappears, and it is represented by voltage zero-cross axis 250.In this example, by arc transfer to the energy of inverter 140 tolerance level lower than inverter 140, and do not hinder the operation of uninterrupted power supply device 100.This is to represent by the inverter DC bus voltage 245 of substantial constant, and described inverter DC bus voltage 245 is held constant at 178V in this example.
See figures.1.and.2, complete after its switching at axle 230 places at relay 125, electric arc is still on relay 125.In other embodiments, controller 145 provide that the time point of conversion command describes with Fig. 2 compared with more approach the zero crossing on axle 250.For example, in the time that controller 145 provides conversion command at the 259 degree phase angles (or 79 degree phase angles) of input voltage waveform 210, just there will be above-mentioned situation, this situation is spent phase angles antithesis with 238 of generation result depicted in figure 2.It is more approaching or exceed the electric arc end point on axis 235 that this makes to have switched axis 230.Therefore, electric arc can disappear before or after handover operation completes.
Fig. 3 has described a kind of method 300 that uninterrupted electric power is provided.The method 300 is used uninterrupted power supply device that uninterrupted electric power is provided, and this uninterrupted power supply device comprises input, output, inverter and two relays.Relay can be optionally by input or inverter and output coupling.The method 300 comprises the behavior (behavior 305) that receives input voltage.In one embodiment, receive input voltage (behavior 305) and comprise the main line input voltage that receives uninterrupted power supply device input end.Power supply can provide input voltage through electrical network.In one embodiment, the input voltage receiving has the nominal value of 120V.
The method 300 comprises the behavior (behavior 310) that detects voltage swells in input voltage.In one embodiment, detecting voltage swells (behavior 310) comprises at least one input voltage sample and reference voltage comparison.For example, when at least one input voltage value that measured or that sampled is during higher than reference voltage, voltage swells just can be detected.In one embodiment, detecting voltage swells (behavior 310) comprises input voltage is sampled, to determine the input voltage of multiple samplings, voltage swells state wherein in the time having two in the input voltage of multiple samplings at least higher than reference voltage or exceed allowed band, detected.
Method 300 also comprises following behavior: the phase angle of identification input voltage, starts handover operation (behavior 315) at this phase angle place.The phase angle of identifying is to provide the phase angle of conversion command with the input voltage of unlatching handover operation at Qi Chu.In response to the detection of voltage swells state, can identify this phase angle.In one embodiment, the phase angle of identifying is determined in advance and is programmed in the firmware of operation uninterrupted power supply device.The phase angle (behavior 315) of identification input voltage can be based on the corresponding time, until input voltage reaches zero crossing.For example, identification phase angle (behavior 315) can comprise the phase angle of identifying input voltage, and it occurred in the time period between 6.3 milliseconds to 3.1 milliseconds before input voltage zero crossing.The behavior of conversion command (behavior 320) that provides also can be provided method 300.For example, controller can provide conversion command to one or more relays, to open handover operation within the time period prior to input voltage zero crossing.
Described now illustrative embodiment more of the present invention, clearly, description is above illustrative and nonrestrictive, and it presents as example.Especially, although the many examples that present at this comprise the concrete combination of method behavior or system element, those behaviors and those elements can otherwise combine to realize identical object.Only be not intended to be got rid of in the similar action from other embodiment in conjunction with behavior, element and the feature of an embodiment discussion.
Notice that, in Fig. 1 to 3, what list is everyly illustrated as individual component.But in the actual execution mode of system and method as herein described, they can be the inseparable parts such as other electronic equipment of digital computer.Therefore, above-mentioned behavior can realize at least in part in firmware or software, and it can be included in the goods that comprise program recorded medium.This program recorded medium can be non-volatile media, and comprise permanent and other data-signal, its be included in carrier wave, computer disks (magnetic or optics, for example, CD or DVD, or both), nonvolatile memory, tape, system storage and computer hard disc driver one or more in.Program recorded medium can at least comprise non-volatile media, and signal can at least comprise non-transient signal.
Mentioning of any execution mode, element or behavior in the system and method occurring with single form mentioned in this article also can be contained the execution mode that comprises multiple elements, and any execution mode, element or the behavior mentioned with plural number also can be contained the execution mode that only includes an element.No matter be to mention or mention with plural form with singulative, all do not mean that system disclosed by the invention, method, parts, behavior or element are only limited to odd number or a plurality of configurations.Arbitrary behavior or the element mentioned based on any information, behavior or element can comprise following execution mode, that is, wherein said behavior or element are at least in part based on any information, behavior or element.
Any execution mode disclosed herein can be combined with other execution mode, mention not necessarily mutual exclusion of " execution mode ", " some execution mode ", " selectable execution mode ", " various execution mode ", " a kind of execution mode " etc., and be intended to show that described certain special characteristic relevant to this execution mode, structure or characteristic can be included at least one execution mode.These terms that the present invention uses differ to establish a capital and refer to identical execution mode.Any execution mode can comprise ground or exclusively, in any mode consistent with each side disclosed herein and execution mode, be combined with other execution mode.
Mention "or" and can be interpreted as inclusive, any term that therefore uses "or" to describe can represent one of described term, any in more than one and all.
System and method described here can embody with other concrete form in the situation that not deviating from its characteristic.For example, execution mode of the present invention is not limited in uninterrupted power supply device, and it conventionally can be for other power supply, transducer, frequency converter, line conditioner or other system.Input and output side of the present invention can comprise the multiple connections for being coupled to respectively voltage source and load, and can comprise more than one controller for the control system of uninterrupted power supply device.Above-mentioned execution mode is illustrative, but not described system and method is limited.Therefore, the scope of system and method as herein described is by appended claim but not above to describe and represent, and the change falling in the implication being equal to and the scope of claim is included in wherein.
Claims (20)
1. a uninterrupted power supply device, comprising:
First input end, it is configured to receive the input AC voltage from power supply, and described input AC voltage has the phase angle being associated;
The second input, it is configured to receive the input voltage from stand-by power supply;
Output, it is configured to provide output power, and this output power is obtained from from least one the electric power in described power supply and described stand-by power supply;
Inverter, it is coupled to described stand-by power supply;
Relay, it is configured in primary importance, described first input end and described output are coupled, and in the second place, described inverter and described output is coupled;
Controller, it is configured to detect the voltage swells state of described input voltage, and in response to described voltage swells state being detected, control described relay and be switched to the described second place from described primary importance in the scope at the predetermined phase angle of described input AC voltage.
2. uninterrupted power supply device according to claim 1, wherein in response to described voltage swells state being detected, described controller is configured to control in the predetermined amount of time of described relay before the zero crossing of described input voltage, is switched to the described second place from described primary importance.
3. uninterrupted power supply device according to claim 1, wherein said controller is configured to control between before the zero crossing of described input voltage 6.3 milliseconds to 3.1 milliseconds of described relay, is switched to the described second place from described primary importance.
4. uninterrupted power supply device according to claim 1, relay is switched to the described second place from described primary importance described in wherein said controller control.
5. uninterrupted power supply device according to claim 1, wherein said first input end comprises input line and the neutral line, in order to receive the described input AC voltage from described power supply, and wherein said relay is configured in described primary importance described input line and the described neutral line and the coupling of described output, and in the described second place, described input line and the described neutral line is coupled with described inverter.
6. uninterrupted power supply device according to claim 1, wherein said inverter comprises DC bus line, and wherein said controller is configured to control the switching of described relay, to keep the substantially invariable voltage of described DC bus line during described voltage swells state.
7. uninterrupted power supply device according to claim 1, wherein said controller is configured to described input AC voltage sample, and the input AC voltage being sampled and reference voltage are compared to detect described voltage swells state.
8. uninterrupted power supply device according to claim 1, wherein said controller is configured to described input AC voltage sample to determine the value of multiple input AC voltages that are sampled, and according to having two values at least higher than reference voltage in the value of one group four the continuous input AC voltages that are sampled, detect described voltage swells state.
9. a method that uses uninterrupted power supply device to distribute uninterrupted electric power, described uninterrupted power supply utensil has input, output, inverter and relay, described relay is configured in primary importance described input and the coupling of described output, and in the second place, described inverter and described output are coupled, described method comprises:
Receive the input voltage from power supply;
Detect the voltage swells state of described input voltage;
In response to described voltage swells state being detected, identify the phase angle of described input voltage to start the handover operation of described relay between described primary importance and the described second place; And
Described phase angle at described input voltage switches to the described second place by described relay from described primary importance.
10. method according to claim 9, wherein switches described relay and comprises in the time period between 6.3 milliseconds to 3.1 milliseconds before the zero crossing of described input voltage conversion command is provided.
11. methods according to claim 9, also comprise:
In response to described voltage swells state being detected, postpone described relay from described primary importance be switched to the described second place behavior until the zero crossing of described input voltage before predetermined amount of time; And
In described predetermined amount of time, described relay is switched to the described second place from described primary importance.
12. methods according to claim 9, wherein said inverter comprises DC bus line, described method also comprises:
Control the switching of described relay between described primary importance and the described second place, to maintain the substantially invariable voltage of described DC bus line during described voltage swells state.
13. methods according to claim 9, also comprise:
Described input voltage is sampled; And
The input voltage being sampled and reference voltage are compared to detect described voltage swells state.
14. methods according to claim 9, also comprise:
Described input voltage is sampled to determine to the value of multiple input voltages that are sampled; And
According to having two values in the value of one group four the continuous input voltages that are sampled at least higher than reference voltage, detect described voltage swells state.
15. methods according to claim 9, also comprise:
Within the time period detecting between described voltage swells state and the zero crossing of described input voltage, described relay is switched to the described second place from described primary importance.
16. 1 kinds of uninterrupted power supply devices, comprising:
First input end, it is configured to receive the input AC voltage from power supply, and described input AC voltage has the phase angle being associated;
The second input, it is configured to receive the input voltage from stand-by power supply;
Output, it is configured to provide at least one the output power of electric power being obtained from from described power supply and described stand-by power supply;
Inverter, it is coupled to described stand-by power supply;
Relay, it is configured in primary importance, described first input end and described output are coupled, and in the second place, described inverter and described output is coupled; And
For detection of the voltage swells state of described input voltage and in response to detecting that relay described in the control of described voltage swells state is switched to the device of the described second place in the scope at the predetermined phase angle of described input AC voltage from described primary importance.
17. uninterrupted power supply devices according to claim 16, also comprise:
For controlling the device that is switched to the described second place in the predetermined amount of time of described relay before the zero crossing of described input voltage from described primary importance.
18. uninterrupted power supply devices according to claim 16, also comprise:
For described input AC voltage being sampled and the input AC voltage being sampled and reference voltage being compared to detect the device of described voltage swells state.
19. uninterrupted power supply devices according to claim 16, wherein said first input end comprises input line and the neutral line, in order to receive the described input AC voltage from described power supply, and wherein said relay is configured in primary importance described input line and the described neutral line and the coupling of described output, and in the second place, described input line and the described neutral line is coupled with described inverter.
20. uninterrupted power supply devices according to claim 16, wherein comprise for providing the described relay of indication to be switched to the device of the conversion command of the described second place from described primary importance for controlling the described device of described relay switch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/197,509 US9024474B2 (en) | 2011-08-03 | 2011-08-03 | UPS mechanical transfer relay arc mitigation |
| US13/197,509 | 2011-08-03 | ||
| PCT/US2012/049285 WO2013019929A1 (en) | 2011-08-03 | 2012-08-02 | Ups mechanical transfer relay arc mitigation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103843227A true CN103843227A (en) | 2014-06-04 |
| CN103843227B CN103843227B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280048380.5A Active CN103843227B (en) | 2011-08-03 | 2012-08-02 | Ups mechanical transfer relay arc mitigation |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9024474B2 (en) |
| EP (1) | EP2740194B1 (en) |
| CN (1) | CN103843227B (en) |
| AU (1) | AU2012290058B2 (en) |
| DK (1) | DK2740194T3 (en) |
| WO (1) | WO2013019929A1 (en) |
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| CN111641256A (en) * | 2019-03-01 | 2020-09-08 | 弗莱克斯有限公司 | Automatic AC Feed Control (AFC) with zero voltage/current switching |
| US20210305908A1 (en) * | 2020-03-30 | 2021-09-30 | Panasonic Intellectual Property Management Co., Ltd. | Switching device, switching power supply apparatus, and vehicle |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20130033109A1 (en) | 2013-02-07 |
| EP2740194A1 (en) | 2014-06-11 |
| CN103843227B (en) | 2017-02-15 |
| AU2012290058A1 (en) | 2014-02-20 |
| WO2013019929A1 (en) | 2013-02-07 |
| AU2012290058B2 (en) | 2017-02-23 |
| EP2740194B1 (en) | 2019-02-13 |
| DK2740194T3 (en) | 2019-05-06 |
| US9024474B2 (en) | 2015-05-05 |
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